Game: Secret Hitler.

Five to 10 people sit around a table. Most of them are liberals, in the broad sense of favoring civil liberties and self-government. Some of them are fascists. And one of them is, as the kids say, literally Hitler.

They're playing Secret Hitler, a board-and-card game for anyone eager to conjure the spirit of late Weimar Germany in the comfort of his living room. The fascists want to install a dictatorship; the liberals want to stop them. And the fascists are all posing as liberals, a fact that can make the liberals as paranoid and purge-happy as their opponents.

One of the designers behind Secret Hitler is Max Temkin, co-creator of the card game Cards Against Humanity, and like his previous project this one has attracted accusations of...